This hedge fund founder, who is shorting Berkshire, was handpicked by Buffett to grill the legendary investor in front of 35,000 shareholders. Read more

“Warren is in the house,” Buffett said under the handle “@WarrenBuffett” — which garnered more than 10,000 followers in the first 10 minutes.

He had more than 125,000 followers as of 3:15 p.m. ET Thursday.

Buffett’s digital debut came during a live webcast hosted by Fortune magazine, which earlier on Thursday published an essay by the Berkshire Hathaway Inc CEO calling on men to help boost women in the workplace.

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Buffett will preside over Berkshire’s annual shareholder meeting in Omaha this weekend, an event that draws more than 35,000 investors — many of whom typically tweet everything Buffett says over the course of the day.

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